NEET-XII-Chemistry
exam-2 year:2016
- #143Which of the following can be used as the
halide component for Friedel-Crafts reaction ?
(1) Chloroethene
(2) Isopropyl chloride
(3) Chlorobenzene
(4) BromobenzenedigAnsr: 2Ans : (2)
Sol. + CH CH Cl
CH3
3Anhy AlCl
C
H CH3
CH3
cumene
But in chlorobenzene, Bromobenzene, chloroethene
lone pair of halogen are delocalised with bonds,
so attain double bond character.